// The Nature of Code

// The Coding Train / Daniel Shiffman

// https://youtu.be/ujsR2vcJlLk

// https://thecodingtrain.com/learning/nature-of-code/5.5-wander.html

​

// Main: https://editor.p5js.org/codingtrain/sketches/LVtVlS52Q

// With Sliders: https://editor.p5js.org/codingtrain/sketches/uxemh7FGc

// Deleting Positions: https://editor.p5js.org/codingtrain/sketches/EWHjy--Os

// 3D: https://editor.p5js.org/codingtrain/sketches/t6sFXmVrk

// Displacement: https://editor.p5js.org/codingtrain/sketches/VdHUvgHkm

// Perlin Noise: https://editor.p5js.org/codingtrain/sketches/XH2DtikuI

​

// sfx

let collectionSound;

let gameOverSound;

​

// plane and particles

let paperAirplane;

let startX = 100;

let startY = 100;

let particles = [];

let particleWeight = 7;

let particleLifeSpan = 5000; // 5 seconds

let particleSpawnRate = 500; // 0.5 seconds

​

let time = 0;

​

function preload() {

  soundFormats('wav');

  collectionSound = loadSound('collection');

  gameOverSound = loadSound('gameOver');

}

​

function setup() {

  createCanvas(800, 500);

​

  paperAirplane = new Vehicle(startX, startY, false)

​

  setInterval(function() {

    if (paperAirplane.maxSpeed > 0.1) {

      time += 0.01

    }

  }, 10)

  setInterval(function() {

    if (paperAirplane.maxSpeed > 0.1) {

      let offset = 30

      let x = random(offset, width - offset)

      let y = random(offset, height - offset);

      particles.push({

        p: createVector(x, y),

        spawnedAt: millis(),

        brightness: 255

      });

    }

  }, particleSpawnRate)

}

​

function reset() {

  particles = [];

  paperAirplane.pos = createVector(startX, startY)

  paperAirplane.maxSpeed = 3.0;

  paperAirplane.maxForce = 0.2;

  time = 0;

}

​

function draw() {

  background("#171e26");

  // information  

  textSize(15);

  fill("#989898")

  noStroke()

  text("Randomized paper airplane game.", 290, 40)

  text("Collecting the yellow particles helps the plane stay moving for a longer time.", 150, 60)

​

  // show particles

  for (let i = 0; i < particles.length; i++) {

    if (millis() - particles[i].spawnedAt > particleLifeSpan) {

      //fade away particle

      stroke(255, 244, 79, particles[i].brightness)

      strokeWeight(particleWeight)

      point(particles[i].p.x, particles[i].p.y) 

      particles[i].brightness--;

      if (particles[i].brightness < 0) {

        particles.splice(i, 1);

      }

    } else {

      stroke(255, 244, 79)

      strokeWeight(particleWeight)

      point(particles[i].p.x, particles[i].p.y) 

    }

  }

  // collecting particles

  for (let i = 0; i < particles.length; i++) {

    let collectionRadius = 30

    if (p5.Vector.dist(paperAirplane.pos, particles[i].p) < collectionRadius) {

      collectionSound.play();

      particles.splice(i, 1); // remove particle

      paperAirplane.maxSpeed += 0.2;

      paperAirplane.maxForce += 0.005

      if (paperAirplane.maxSpeed > 3) {

        paperAirplane.maxSpeed = 3

      }

      if (paperAirplane.maxForce > 0.2) {

        paperAirplane.maxForce = 0.2

      }

    }

  }

  // wander

  if (paperAirplane.maxSpeed > 0.3) {

    paperAirplane.wander();

  } else {

    gameOverSound.play();

    textSize(40)

    noStroke()

    fill("#50C878")

    text(`Score: ${time.toFixed(2)} seconds`, 200, height/2)

    noLoop();

    setTimeout(function(){

      reset();

      loop();

    }, 3000)

    paperAirplane.maxSpeed = 0.00001

  }

  // update airplane

  paperAirplane.update();

  paperAirplane.show();

  paperAirplane.edges();

  // statistics

  textSize(15);

  noStroke()

  text(`Airtime: ${time.toFixed(2)}`, 6, height-32);

  if (paperAirplane.maxSpeed > 2) {

    fill("#50C878")

  } else if(paperAirplane.maxSpeed > 1) {

    fill("#ffae42")

  } else if(paperAirplane.maxSpeed > 0) {

    fill("#ff3131")

  }

  noStroke()

  text(`Max Speed: ${paperAirplane.maxSpeed.toFixed(2)}`, 7, height - 10);

}

​